This
principle helps explain the buoyancy of an object in a medium,
such as water.
The Principle states that an object that is fully or partially
immersed in a liquid (water)
experiences a buoyant force that is
equal to the weight of the medium (water)
displaced. The equation of the buoyant force
is given as follows

If
the weight of the object, W, is greater than the buoyant force,
U, the object sinks.
If the weight of the object, W, is less than the buoyant force,
U, the object floats.
See also pressure
in liquids.